CN107703928A - Control system and protection device - Google Patents
Control system and protection device Download PDFInfo
- Publication number
- CN107703928A CN107703928A CN201711173701.5A CN201711173701A CN107703928A CN 107703928 A CN107703928 A CN 107703928A CN 201711173701 A CN201711173701 A CN 201711173701A CN 107703928 A CN107703928 A CN 107703928A
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- China
- Prior art keywords
- master control
- control set
- protection device
- controlled
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 230000002159 abnormal effect Effects 0.000 claims abstract description 11
- 238000012544 monitoring process Methods 0.000 claims description 29
- 238000001514 detection method Methods 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 9
- 239000000567 combustion gas Substances 0.000 description 6
- 230000002427 irreversible effect Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Safety Devices In Control Systems (AREA)
Abstract
The present invention provides a kind of control system, and the control system includes master control set, controlled device and the switching device being connected between the master control set and the controlled device.The master control set provides control signal to the controlled device.The switching device is used to open and close the passage between the master control set and the controlled device.The control system also includes the protection device being connected between the master control set and the switching device.The protection device outside the master control set independently of installing; and the switching device is closed to cut off the passage between the master control set and the controlled device when the master control set occurs abnormal, the controlled device is no longer controlled by the master control set.So, due to the protection device in control system independently of master control set outside, when master control set occur it is abnormal when, protection device still can work independently, and can improve the stability of control system.The present invention also provides a kind of protection device.
Description
Technical field
The present invention relates to a kind of control system, more particularly to a kind of protection device of control system.
Background technology
At present, the equipment protection unit of most of control systems or system and master control unit or System build are in same electricity
In gas control element, this causes concentration of risk of the equipment for device failure together.Whether PLC or other electronics controls
System processed, under given conditions, such as magnetic interference, humiture exception etc., there is certain unstability, if occurring a certain
The damage of critical device cause the judgement of system mistake, can not send it is effective judge when, equipment will be in and " lose
Control " state, this is extremely hazardous.
The content of the invention
In view of this, the present invention proposes a kind of preferable control system of stability.
A kind of control system, it includes master control set, controlled device and is connected to the master control set and described controlled pair
Switching device as between, the master control set provide control signal to the controlled device to ensure that the controlled device is normal
Work；The switching device is used to open and close the passage between the master control set and the controlled device；The control
System also includes the protection device being connected between the master control set and the switching device；The protection device is independently of institute
State and installed outside master control set, and close the switching device when the master control set occurs abnormal and filled with cutting off the master control
The passage between the controlled device is put, the controlled device is no longer controlled by the master control set.
In one embodiment, the protection device includes detection unit, comparing unit, control unit and execution unit；Institute
Monitoring unit is stated to monitor the running status of the master control set and export monitoring signals；The comparing unit will receive the prison
The number of survey signal to judge whether monitoring signals and predetermined value match compared with predetermined value, in monitoring believe by the comparing unit
Comparison signal is sent when number matching with predetermined value, and comparison signal is sent to described control unit；Described control unit is rung
Answer comparison signal output control signal and send control signals to the execution unit；The execution unit responsive control signal
The switching device is closed to cut off the passage of the master control set and the controlled device.
In one embodiment, the protection device is equal to or higher than the master control set in the priority of control logic.
In one embodiment, the protection device and the master control set and the controlled device for opened loop control so that institute
State the stability of protection device is not influenceed by the master control set and the controlled device.
In one embodiment, the protection device has independent power supply.
In addition, the present invention also provides a kind of stability preferable protection device.
A kind of protection device, in control system, the control system also to include master control set, controlled device and connection
Switching device between the master control set and the controlled device, the master control set provide control signal to described controlled
Object is to ensure the controlled device normal work；The switching device is used to open and close the master control set and the quilt
Control the passage between object；The protection device is connected between the master control set and the switching device；The protection dress
Put and installed independently of outside the master control set, and the switching device is closed to cut off when the master control set occurs abnormal
Passage between the master control set and the controlled device, the controlled device is set no longer to be controlled by the master control set.
In one embodiment, the protection device includes detection unit, comparing unit, control unit and execution unit；Institute
Monitoring unit is stated to monitor the running status of the master control set and export monitoring signals；The comparing unit will receive the prison
The number of survey signal to judge whether monitoring signals and predetermined value match compared with predetermined value, in monitoring believe by the comparing unit
Comparison signal is sent when number matching with predetermined value, and comparison signal is sent to described control unit；Described control unit is rung
Answer comparison signal output control signal and send control signals to the execution unit.The execution unit responsive control signal
The switching device is closed to cut off the passage of the master control set and the controlled device.
In one embodiment, the protection device is equal to or higher than the master control set in the priority of control logic.
In one embodiment, the protection device and the master control set and the controlled device for opened loop control so that institute
State the stability of protection device is not influenceed by the master control set and the controlled device.
In one embodiment, the protection device has independent power supply.
In summary, the present invention for reply control system caused by the accident bad damage and caused by control it is disorderly
The abnormal conditions such as random, out of control, and propose a kind of control system.In the present invention provides control system, the protection device is independent
Installed outside the master control set, during so that irreversible burst damage occurring for the proper master control set, the protection dress
Emergency protection measure can be started in time by putting.So, due to the protection device in control system independently of master control set outside, work as master
When control device occurs abnormal, protection device still can work independently, and can improve the stability of control system.
Brief description of the drawings
Fig. 1 is the functional block diagram of the control system of one embodiment of the present invention.
Embodiment
Before describing the embodiments in more detail, it should be understood that the invention is not restricted to institute hereafter or in accompanying drawing in the application
The detailed construction or arrangement of elements of description.The present invention can be the embodiment that other manner is realized.Furthermore, it is to be understood that this paper institutes
The wording and term used is solely for describing purposes, should not the explanation of being construed as limiting property." comprising " used herein, "comprising",
The similar wording such as " having " is meant comprising items listed thereafter, its equivalent and other additional things.Particularly, description is worked as
When " certain element ", the quantity that the present invention does not limit the element can also include multiple as one.
As shown in figure 1, the present invention provides a kind of control system 99.Control system 99 includes master control set 10, switching device
30, controlled device 40 and protection device 50.Protection device 50 master control set 10 and is protected independently of being installed outside master control set 10
Protection unit 50 each has independent power supply.So, protection device 50 is separated from each other with master control set 10 so that works as master control set
10 occur emergency situations or irreversible burst damage etc. it is abnormal when, protection device 50 can normal startup optimization, and can
Start the emergency protection measure being previously set with timely.In the present embodiment, master control set 10 is the control system that DSP is processor
System.Switching device 30 could be arranged to contactor or magnetic valve as needed.Controlled device 40 is power circuit or natural
Feed channel.Protection device 50 is that the emergency protection system of main purpose is cut to for natural gas line.
Switching device 30 is connected between master control set 10 and controlled device 40, and switching device 30 is used to open and close master
Control the passage between device 10 and controlled device 40.When the acquiescence of switching device 30 is in open mode, master control set 10 provides control
Signal B processed is to controlled device 40 to ensure the normal work of controlled device 40.In the present embodiment, switching device 30 can include
Two layers of switch element is first switch unit and second switch unit.First switch unit is controlled by master control set 10.Second
Switch element is controlled by protection device 50.Second switch unit is than first switch unit closer to source of the gas.
Protection device 50 is connected between master control set 10 and switching device 30.Protection device 50 includes detection unit 520,
Memory cell 530, comparing unit 550, control unit 560, execution unit 570.Detection unit 520 monitors the fortune of master control set 10
Row state simultaneously exports monitoring signals A.Detection unit 520 is connected in parallel on master control set 10, and is monitoring that master control set 10 occurs
Emergency situations or irreversible burst damage etc. send monitoring signals A when abnormal.In the present embodiment, detection unit 520
It can be a sensor.Memory cell 530 is Flash registers.In other embodiments, detection unit 520 can also
It is integrated in master control set 10, the device of signal specific can be produced (such as being one on master control set 10 when out of control
Watchdog etc.), detection unit 520 is the cross section of protection device 50 and master control set 10.
Comparing unit 550 compares the number for receiving monitoring signals A with predetermined value C to judge monitoring signals and make a reservation for
Whether value matches.Comparing unit 550 sends comparison signal when monitoring signals A and predetermined value C match, and comparison signal is sent out
Give control unit 560.In the present embodiment, above-mentioned predetermined value C is stored in advance in memory cell 530.In this embodiment party
In formula, integrated counter, the counter monitoring signals A can be received for adding up comparing unit 550 in comparing unit 550
Number.
The response ratio of control unit 560 is sent to execution unit 570 compared with signal output control signal B and by control signal B.Hold
The responsive control signal B closing switchs device 30 of row unit 570 makes to be controlled to cut off the passage of master control set 10 and controlled device 40
Object 40 is no longer controlled by master control set 10.In the present embodiment, control unit 560 can be a special relay such as temperature
Relay is spent, can also be by being made up of a variety of multiple relays and other its electric equipment.Execution unit 570 is control unit 560
The next stage movement structure of control, it can be independent structure, can also be integrated in control unit 560.Execution unit 570
It can be relay.In other embodiments, memory cell 530 and comparing unit 550 can also be integrated in control unit 560
It is interior.
Below the present invention is specifically described using gas turbine control system as a specific embodiment.The base of protection device 50
Control and processing are realized in dsp chip.By in the DSP of master control set 10 the meeting in the case of program fleet of watchdog circuits
The feature of reset signal is produced as monitoring signals.When master control set 10 continuously by external interference when, master control set 10
Watchdog programs can continuously generate reset signal, meanwhile, monitoring signals of this reset signal as protection device 50, make detection
Unit 520 constantly receives monitoring signals.When the quantity of monitoring signals reach certain number (by counter produce signal A with
Predetermined value C is matched) when, it is possible to determine that " master control set 10 can not normal operation ", now, be taken over by protection device 50, make to be controlled
Object 40 is steadily shut down.It is specific as follows：
When rolling counters forward reaches pre-determined number, i.e. A=C, comparison signal is produced, C is setting for counter in present case
Put value.
After control unit 560 receives comparison signal, steady shutdown procedure is triggered, and takes over the part behaviour of master control set 10
Make.
In case, by taking gas turbine engine systems as an example, significant outages operating procedure：Gas supply amount is reduced to putting out
--- --- --- ----cut-out front end gas supply --- --- opens ventilating and cooling or jiggering is cold for-cut-out generator external connection for fire
But.
When in particular cases, as major accident occurs, now master control set 10 can produce the signal of cut-out gas supply, this
When the auxiliary operation of protection device 50, using the advantage that does not power off of emergency power supply supply itself, whether detection combustion gas is cut off, and works as detection
When " combustion gas is not cut off ", auxiliary operation cut-out combustion gas front end supply.Combustion gas front end supply herein refers to control than master control set 10
The magnetic valve of system closer to source of the gas and by the magnetic valve (foregoing second switch unit) of the independent control of protection device 50.
From the foregoing, it will be observed that using above-mentioned control system 99, when 50 continuous once or more of protection device monitors to control
Exception occurs for system 10, and protection device 50 can start and closing switch device 30 is likely to become controlled pair of dangerous matter sources with barrier
As 40.Wherein switching device 30 can be controllable valve or switch, and for cutting off or discharging controlled amounts, the controlled amounts are, for example, to fire
The combustion gas of gas-turbine, the oil circuit of fuel system.
From above-described embodiment, controlled device 30 and protection device 50 and master control set 10 are opened loop control, each device
Stability do not influence each other.Protection device 50 is equal to or higher than master control set 10 in the priority of control logic, so sets
Put so that when emergency situations occur for master control set 10, protection device 50 can start and run in the very first time, be protected with realizing
Shield personal safety, protection equipment are main purpose, and loss is minimized.
In summary, the present invention for reply control system 99 caused by the accident bad damage and caused by control it is disorderly
The abnormal conditions such as random, out of control, and a kind of control system 99 proposed.Protection device 50 and master control set 10 are separated from each other, and
It is the cut-out of dangerous matter sources in control system in view of simplicity principle, on the protection philosophy of the protection device 50, such as gas turbine
Combustion gas, the oil circuit etc. of fuel system.By caused letter when the triggering of protection device 50 is judged to correspond to master control set " out of control "
Number it is input signal, by certain logic circuit, output signal cuts off dangerous matter sources, reaches the dangerous purpose of barrier.At this
In the control system 99 of invention, protection device can letter can be numerous, safeguard and change convenient, disperse danger, for the stabilization of control system
Operation and the protection of equipment have good adaptability.
Concepts described herein may be embodied to other forms in the case of without departing from its spirit and characteristic.It is disclosed
Specific embodiment should be considered as exemplary rather than restricted.Therefore, the scope of the present invention be by appended claim,
Rather than it is determined according to these descriptions before.Any change in the letter of claim and equivalency range is all
The scope of these claims should be belonged to.
Claims (10)
1. a kind of control system, it includes master control set, controlled device and is connected to the master control set and the controlled device
Between switching device, the master control set provides control signal to the controlled device to ensure the normal work of the controlled device
Make；The switching device is used to open and close the passage between the master control set and the controlled device；It is characterized in that：
The control system also includes the protection device being connected between the master control set and the switching device；The protection device
Independently of being installed outside the master control set, and the switching device is closed to cut off when the master control set occurs abnormal
The passage between master control set and the controlled device is stated, the controlled device is no longer controlled by the master control set.
2. control system as claimed in claim 1, it is characterised in that：The protection device includes detection unit, comparing unit,
Control unit and execution unit；The monitoring unit monitors the running status of the master control set and exports monitoring signals；It is described
Comparing unit the number for receiving the monitoring signals is compared with predetermined value with judge monitoring signals and predetermined value whether
Match somebody with somebody, the comparing unit sends comparison signal when monitoring signals and predetermined value match, and comparison signal is sent to described
Control unit；Described control unit response ratio is compared with signal output control signal and sends control signals to the execution unit；
The execution unit responsive control signal closes the switching device to cut off the logical of the master control set and the controlled device
Road.
3. control system as claimed in claim 1, it is characterised in that the protection device is first-class in the priority of control logic
In or higher than the master control set.
4. control system as claimed in claim 1, it is characterised in that the protection device and the master control set and the quilt
Object is controlled by opened loop control so that the stability of the protection device is not influenceed by the master control set and the controlled device.
5. the control system as described in claim any one of 1-4, it is characterised in that the protection device has independent electricity
Source.
6. a kind of protection device, in control system, the control system also includes master control set, controlled device and is connected to
Switching device between the master control set and the controlled device, the master control set provide control signal to described controlled pair
As to ensure the controlled device normal work；The switching device is used to opening and closing the master control set and described controlled
Passage between object；It is characterized in that：The protection device is connected between the master control set and the switching device；Institute
Protection device is stated independently of being installed outside the master control set, and the switch dress is closed when the master control set occurs abnormal
Put to cut off the passage between the master control set and the controlled device, make the controlled device no longer by the master control set
Control.
7. protection device as claimed in claim 6, it is characterised in that：The protection device includes detection unit, comparing unit,
Control unit and execution unit；The monitoring unit monitors the running status of the master control set and exports monitoring signals；It is described
Comparing unit the number for receiving the monitoring signals is compared with predetermined value with judge monitoring signals and predetermined value whether
Match somebody with somebody, the comparing unit sends comparison signal when monitoring signals and predetermined value match, and comparison signal is sent to described
Control unit；Described control unit response ratio is compared with signal output control signal and sends control signals to the execution unit.
The execution unit responsive control signal closes the switching device to cut off the logical of the master control set and the controlled device
Road.
8. protection device as claimed in claim 6, it is characterised in that the protection device is first-class in the priority of control logic
In or higher than the master control set.
9. control system as claimed in claim 6, it is characterised in that the protection device and the master control set and the quilt
Object is controlled by opened loop control so that the stability of the protection device is not influenceed by the master control set and the controlled device.
10. the control system as described in claim any one of 6-9, it is characterised in that the protection device has independent electricity
Source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711173701.5A CN107703928B (en) | 2017-11-22 | 2017-11-22 | Control system and protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711173701.5A CN107703928B (en) | 2017-11-22 | 2017-11-22 | Control system and protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107703928A true CN107703928A (en) | 2018-02-16 |
| CN107703928B CN107703928B (en) | 2024-05-03 |
Family
ID=61185334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711173701.5A Active CN107703928B (en) | 2017-11-22 | 2017-11-22 | Control system and protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107703928B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02214901A (en) * | 1989-02-15 | 1990-08-27 | Hitachi Ltd | Protecting device and control device for electrical equipment |
| WO2008004445A1 (en) * | 2006-07-06 | 2008-01-10 | Panasonic Corporation | Protecting apparatus, and protecting method, signal processing method and electrical quantity detecting method employed by the protecting apparatus |
| CN103387168A (en) * | 2012-05-10 | 2013-11-13 | 戴开煌 | Elevator emergency electric control protecting system |
| CN204578064U (en) * | 2015-04-17 | 2015-08-19 | 浙江恒自电力自动化设备有限公司 | A kind of line protective devices with humidity alarm |
| CN105929811A (en) * | 2016-04-06 | 2016-09-07 | 清华大学 | Protection circuit for program deadlock |
-
2017
- 2017-11-22 CN CN201711173701.5A patent/CN107703928B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02214901A (en) * | 1989-02-15 | 1990-08-27 | Hitachi Ltd | Protecting device and control device for electrical equipment |
| WO2008004445A1 (en) * | 2006-07-06 | 2008-01-10 | Panasonic Corporation | Protecting apparatus, and protecting method, signal processing method and electrical quantity detecting method employed by the protecting apparatus |
| CN103387168A (en) * | 2012-05-10 | 2013-11-13 | 戴开煌 | Elevator emergency electric control protecting system |
| CN204578064U (en) * | 2015-04-17 | 2015-08-19 | 浙江恒自电力自动化设备有限公司 | A kind of line protective devices with humidity alarm |
| CN105929811A (en) * | 2016-04-06 | 2016-09-07 | 清华大学 | Protection circuit for program deadlock |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107703928B (en) | 2024-05-03 |
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